Ask HN: Why it is seemingly hard to break duopolies in hardware?
x86 CPU, Intel and AMD.
Ram chips, SK Hynix and Samsung (Micron and Elpida were tired in third/fourth place, when Elpida went bankrupt and got purchased by Micron, they temporarily overtook Hynix, but now their combined market share shrunk even further than before Elpida went bankrupt, cementing Hynix in second place).
Flat Panels I remember there were only a couple manufacturers, and just by Sony and someone else decided to stop making CRTs they killed the entire CRT market at the same time.
Internal Sound Cards, Creative and Asus Xonar.
Many other stuff is divided between Asus (ASMedia + spinoffs, like ASRock) and Formosa Plastics (owners of Via, WonderMedia, S3, Centaur...)
HDDs now are mostly WD and companies they purchased, or Seagate and the companies they purchased.
and the list keeps going on.
Many of these look ready to be disrupted by new competitors... but there are few attempts, for example PowerVR started as desktop GPU product, Intel tried to get into GPUs, Via still attempts sometimes to launch x86 CPUs, but for most part, all these markets are de-facto duopolies, and sometimes real duopolies, having literally no competitors (not even tiny ones).
Why is that?